{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:MMW7FHFX6AKPKPA4YOM5FUIP3E","short_pith_number":"pith:MMW7FHFX","canonical_record":{"source":{"id":"2111.14179","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-11-28T15:39:28Z","cross_cats_sorted":[],"title_canon_sha256":"8b79224e6dd096a9a70e2f4d14d9a41548e02dc53ae708bca3c4805ceea8bf31","abstract_canon_sha256":"ecaf368517c11cebcb6336d42b8ee0c0b37d87812014d89486957efb72499a7a"},"schema_version":"1.0"},"canonical_sha256":"632df29cb7f014f53c1cc399d2d10fd93378496f7f079e951c51449c02d9b8d5","source":{"kind":"arxiv","id":"2111.14179","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.14179","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"2111.14179v1","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.14179","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"MMW7FHFX6AKP","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"pith_short_16","alias_value":"MMW7FHFX6AKPKPA4","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"pith_short_8","alias_value":"MMW7FHFX","created_at":"2026-07-05T03:56:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:MMW7FHFX6AKPKPA4YOM5FUIP3E","target":"record","payload":{"canonical_record":{"source":{"id":"2111.14179","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-11-28T15:39:28Z","cross_cats_sorted":[],"title_canon_sha256":"8b79224e6dd096a9a70e2f4d14d9a41548e02dc53ae708bca3c4805ceea8bf31","abstract_canon_sha256":"ecaf368517c11cebcb6336d42b8ee0c0b37d87812014d89486957efb72499a7a"},"schema_version":"1.0"},"canonical_sha256":"632df29cb7f014f53c1cc399d2d10fd93378496f7f079e951c51449c02d9b8d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:56:17.214111Z","signature_b64":"hH2iZ2G4Q2BA3AdQgDyz4ITTafSj2zNCtCwdi6VRTg8dVFoPat+OlirAavBE+mFW6sqD6vXuyH2EDViOKeYoDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"632df29cb7f014f53c1cc399d2d10fd93378496f7f079e951c51449c02d9b8d5","last_reissued_at":"2026-07-05T03:56:17.213647Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:56:17.213647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.14179","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:56:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TKdztzojIAqURiO4nY1ZjWMmvbwac2F+FuHCS/bGVgewfIjNxG5q4pn4J5RoJryUSUlqslki1SX0y7Y7iA6PDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T13:36:40.197808Z"},"content_sha256":"894f91641e20ebbeea0b6c604eb2dd46168c654ce186b273f78d4c17c62d02e3","schema_version":"1.0","event_id":"sha256:894f91641e20ebbeea0b6c604eb2dd46168c654ce186b273f78d4c17c62d02e3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:MMW7FHFX6AKPKPA4YOM5FUIP3E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Maximum Baryon Masses for Static Neutron Stars in $f(R)$ Gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"A.V. Astashenok, S. Capozziello, S.D. Odintsov, V.K. Oikonomou","submitted_at":"2021-11-28T15:39:28Z","abstract_excerpt":"We investigate the upper mass limit predictions of the baryonic mass for static neutron stars in the context of $f(R)$ gravity. We use the most popular $f(R)$ gravity model, namely the $R^2$ gravity, and calculate the maximum baryon mass of static neutron stars adopting several realistic equations of state and one ideal equation of state, namely that of causal limit. Our motivation is based on the fact that neutron stars with baryon masses larger than the maximum mass for static neutron star configurations inevitably collapse to black holes. Thus with our analysis, we want further to enlighten"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.14179","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2111.14179/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:56:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y49oHs2lQc7u96ne/2R/eQ+VKoILy7ab5pEZQUhOhrtAMecc8jRbl11g3oCD52rwEvASWp6n17+9IyuoTJ4mDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T13:36:40.198763Z"},"content_sha256":"3a81b6aa7c4e4b8b744661ca5ea1d87a4ffc6c3891e9b45c16cbc652e75fa694","schema_version":"1.0","event_id":"sha256:3a81b6aa7c4e4b8b744661ca5ea1d87a4ffc6c3891e9b45c16cbc652e75fa694"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E/bundle.json","state_url":"https://pith.science/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-13T13:36:40Z","links":{"resolver":"https://pith.science/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E","bundle":"https://pith.science/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E/bundle.json","state":"https://pith.science/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MMW7FHFX6AKPKPA4YOM5FUIP3E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:MMW7FHFX6AKPKPA4YOM5FUIP3E","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ecaf368517c11cebcb6336d42b8ee0c0b37d87812014d89486957efb72499a7a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-11-28T15:39:28Z","title_canon_sha256":"8b79224e6dd096a9a70e2f4d14d9a41548e02dc53ae708bca3c4805ceea8bf31"},"schema_version":"1.0","source":{"id":"2111.14179","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.14179","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"2111.14179v1","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.14179","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"MMW7FHFX6AKP","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"pith_short_16","alias_value":"MMW7FHFX6AKPKPA4","created_at":"2026-07-05T03:56:17Z"},{"alias_kind":"pith_short_8","alias_value":"MMW7FHFX","created_at":"2026-07-05T03:56:17Z"}],"graph_snapshots":[{"event_id":"sha256:3a81b6aa7c4e4b8b744661ca5ea1d87a4ffc6c3891e9b45c16cbc652e75fa694","target":"graph","created_at":"2026-07-05T03:56:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2111.14179/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the upper mass limit predictions of the baryonic mass for static neutron stars in the context of $f(R)$ gravity. We use the most popular $f(R)$ gravity model, namely the $R^2$ gravity, and calculate the maximum baryon mass of static neutron stars adopting several realistic equations of state and one ideal equation of state, namely that of causal limit. Our motivation is based on the fact that neutron stars with baryon masses larger than the maximum mass for static neutron star configurations inevitably collapse to black holes. Thus with our analysis, we want further to enlighten","authors_text":"A.V. Astashenok, S. Capozziello, S.D. Odintsov, V.K. Oikonomou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-11-28T15:39:28Z","title":"Maximum Baryon Masses for Static Neutron Stars in $f(R)$ Gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.14179","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:894f91641e20ebbeea0b6c604eb2dd46168c654ce186b273f78d4c17c62d02e3","target":"record","created_at":"2026-07-05T03:56:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ecaf368517c11cebcb6336d42b8ee0c0b37d87812014d89486957efb72499a7a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-11-28T15:39:28Z","title_canon_sha256":"8b79224e6dd096a9a70e2f4d14d9a41548e02dc53ae708bca3c4805ceea8bf31"},"schema_version":"1.0","source":{"id":"2111.14179","kind":"arxiv","version":1}},"canonical_sha256":"632df29cb7f014f53c1cc399d2d10fd93378496f7f079e951c51449c02d9b8d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"632df29cb7f014f53c1cc399d2d10fd93378496f7f079e951c51449c02d9b8d5","first_computed_at":"2026-07-05T03:56:17.213647Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:56:17.213647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hH2iZ2G4Q2BA3AdQgDyz4ITTafSj2zNCtCwdi6VRTg8dVFoPat+OlirAavBE+mFW6sqD6vXuyH2EDViOKeYoDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:56:17.214111Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.14179","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:894f91641e20ebbeea0b6c604eb2dd46168c654ce186b273f78d4c17c62d02e3","sha256:3a81b6aa7c4e4b8b744661ca5ea1d87a4ffc6c3891e9b45c16cbc652e75fa694"],"state_sha256":"51da199bd8346e1e640ed4bd25aa5e37d89ffd2ea46f7521836323c130ccceff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T/pjp6RxC2+NT8Mbc/Pf+WlfjyrE+28/jnpMlpEkHEUK7mpvrbygnFvxXk2yYtRJH5Ccp7JaQ7zIWsHEhk98AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T13:36:40.203660Z","bundle_sha256":"3ea0ed2e57ef0a3e56c3711b9cc029be584f35145a588cb1c84280802cefa3be"}}